Half to harvey s



(No Model.) 2 Sheets-Sheet 1.

0. C. L. EKMAN.

SURFACE GAGE.

No. 519,703. l Patented May l5, 1894.

W|TNESSES [NVENTOR ATTORN EYS.

Si n@ @Ma/ (No Modem f 2 "sheets-sheet 2.

o. 0.x L. E KMAN.

SURFAGE. GAGE.

No. 519,703. i Patented May 15, 1894.

WITN ESSES:

INVENTOR ATTORN EYs'.

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l NITED STATES PATENT. OFFICE.

OSCAR OH. L. EKMAN, OF SYRACUSE, NEW YORK, ASSIGNOR OF ONE- y HALF TOHARVEY S. BARTLETT, 0Fv SAME PLACE.

SURFACE-GAG E.

SPECIFICATION forming part of Letters Patent No. 519,703, dated May 15,1894.

Application filed May 15, 1893. Serial No. 474,204.. (No model.)

To @ZZ whom t may concern:

Be it known that I, OsoAR CHARLES L. EKMAN, of Syracuse, in the countyof Onondaga, in the State of New York, have invented new and usefulImprovements in Surface- Gages, of which the following, taken inconnection with the accompanying drawings, is a full, clear, and exactdescription.

My invention relates to surface gages and my object is to provide a gagewith means for mechanically adjusting and setting the needle point, asdistinguished from adjustment by hand; such adjusting mechanismcomprising a needle grip upon the hub of a gear, a shaft carrying saidgear and upon Which it rotates, and means to carry said shaft and adjustit vertically, and means, as awormscrew, to rotate the gear as may bedesired, and swing the needle-point and adjust it vertically by therotation of said gear.

My invention consists in the several novel features of construction andoperation hereinafter described and which are specifically set forth inthe claims hereunto annexed. It is constructed as follows, referencebeing'had to the accompanying drawings, in which- Figure l, is a sideelevation of the gage, complete. Fig. 2, is a front elevation of thesame. Fig. 3, is a vertical sectional elevation of the same.

A, is the standard erected upon a suitable base,and a is a sleeve adjustablef verticallythereon by means of the set-screw -aeither with orwithout the use of the concave grip-plate -bbearing against the standardand forced against it by said set-screw; said grip-plate being, Whendesired, provided with end ilanges -hwhich fit in and are adapted toreciprocate in grooves -b in the ends of said sleeve. A shaft or arborcis secured in said sleeve, and upon it the gear -dis loosely mountedhaving a hub d'- provided in its outer end with a concavity -e--, and his a grip-disk also loose upon said shaft and provided with a concavity-ecoinciding with the concavity e-;

and -h"-is a set-screw upon the threaded end of said sleeve, andprovided, when desired, with a concavity 7cinto which a coiled spring-lcis inserted, fitting around the shaft and creating' a spring frictiongrip upon the needle -mto hold it in the concavities -e-eand prevent itslongitudinal movement therein, except when desired. Arms -nbranch outfrom said sleeve and -hfis a Worm-screw or gear mounted .therein inengagement with the gear -d-so that the rotation of thevvorm rotates thegear'and swings the point of the needle vertically and adjusts and setsit at the point desired, as shown by the dotted lines in Fig. 2.

The rotation of the gear is regulated by the set-screw -h What I claimas my invention, and desire to secure by Letters Patent, is

The combination with the standard and a sleeve adjustably mountedthereon, an arbor secured to said sleeve, and arms branching outwardfrom said sleeve, of a worm journaled in said arms, a worm gearjournaled upon said arbor and driven by said Worm, and a needle grippedupon the hub of said gear and at one side of the center thereof, andadjustable longitudinally.

2. The combination with the standardand a sleeve adj ustably mountedthereon, an arbor secured to said sleeve, and arms branching outwardfrom said sleeve, of a worm journaled in said arms, a worm gearjournaled

